Seasonal wind variations over Antarctica in an altitude region from surface up to about 80 km are studied using data from 52 successful M-100 meteorological rocket soundings at Molodezhnaya, Antarctica where the author worked during 1971-73. It is found that the South Polar summer was characterised by light easterly winds increasing in strength with altitude and the winter exhibited strong westerly winds having jet speeds of about 90 m/s increasing in strength as the season progressed, while the autumn and the spring were the wind reversal periods. The Antarctic winter regime was the most active period with a wind persistence of about 95% marked by strong westerly flow. Departures of the actual zonal winds from the Groves Model were found to be quite significant showing hemispheric asymmerties in the Northern and the Southern Hemispheres. The physical properties of the immense southern oceans play an important role in these differences.